It’s hard to keep an eye on your valuable belongings at the beach or park, especially if you’re by yourself. This simple trick disguises your stuff as something nobody would ever want to steal.

In this video, youtuber Grant Thompson shares some useful tips for enjoying a day at the beach. Some we’ve mentioned before, like fighting off swimmer’s ear and using baby powder to make sand removal super easy, but Thompson demonstrates a tip you might not have thought of. The next time you’re headed to the beach, park, or anywhere you might need to leave your valuables unattended, bring a diaper. Just place your phone, keys, wallet, and whatever else inside the diaper and set it next to your beach towel or blanket. Your stuff will be safe from the elements and thieves because nobody is going to try and steal what appears to be a used diaper.